摘要各类火灾事件令人触目惊心，特别是宾馆这类公众场所，具有电路复杂，人员繁多，环境封闭等特点，如果火灾时没有及时预警，将会造成很严重的后果。因此为了保证人民财产安全，除了宣传火灾相关知识外，必须要研制快速有效的火灾报警系统，在火灾处于萌芽状态时，就及时地发现并处理。77157

科学发展与进步使得温度，烟雾，湿度，光强等模拟量能够经过转换变为数字量，从而统一进行处理。此次设计采用电阻式烟雾传感器和温度传感器，基于AT89C51单片机，设计出一款稳定的自动火灾报警器，共做了如下工作： 

首先介绍了具体工作情况和系统的实现功能；

然后选型系统硬件,从功能特性分析，详细介绍了单片机、传感器及A/D转换器，之后再基于硬件连接各个模块电路；其次介绍了软件总体流程及子程序流程；最后基于Proteus平台进行了仿真和调试。

该系统的烟雾检测通过选用MQ-2型半导体可燃气体烟雾传感器来实现，经济实用，而且能够灵敏地转换数据。温度的检测采用DS18B20温度传感器，容易连接且自带数据存储，具有很好的实用性。

毕业论文关键词  单片机  传感器  火灾报警

毕业设计说明书外文摘要

Title The System of Smoke Alarm for Hotel Based on SCM

Abstract There are many potential fire factors in our daily life,we are shocked as we hear fire events。Especially in public places such as hotels,with features of complicated digital circuits,massive population,closed environment,if the fire is not timely alarmed,serious consequences may take place。In order to ensure the safety of people and their properties and promote related knowledge,we must research effective fire alarm system so that we can find out and put out fire in time when it happens。

With the progress of science,various types of sensors have been developed rapidly:temperature,humidity,smoke,light intensity and so on。Analog signals can be converted into digital signals,and then be processed uniformly。This design combines the resistance type smoke sensor with temperature sensor,51 single-chip microcomputer into a simple and stable fire alarm system。Works are listed below。

Firstly,introducing specific works and functions of the system。

Secondly，selecting components and describing 51 microcomputer、sensors、A/D transverter and modular circuit in detail。

Then,introducing general software process as well as subprogram process。

Finally,conducting simulation and debugging on Proteus platform。

Choosing Cost-effective and delicate MQ-2 type semiconductor combustible gas sensor as smoke sensor,to achieve the temperature detection,DS18B20 temperature sensor is applied which is easy for storing and connecting。

Keywords  51 single-chip microcomputer   Sensor   Fire alarm

目   次

目   次 I

1 引言 1

1。1 研究的背景及意义 1

1。2 研究现状 1

1。3 本文完成的工作及章节安排 3

2 系统规划及开发工具